Jeoloji Mühendisliği Dergisi

ABSTRACT: M this study, ît`§ been attempted to submit the efnielii*ï«ns of the invustiffations carried out on «Mérite samples by or© preparation methods. By means of siöve analyses, ana nm^netic séparation methods; the mineral paragen^sis of IJeveci sidelit^ deposit©, frcwn top to the bottom, has btew determined as, siderii ;+ SiO2 (ait toe top) mıû siderit + SiO2 4- + Ankerit/doteanlte (toward tiie deeper level»). As a» example, Wm be^i attempted to imlïeato fia Deveci eiderite depoelte titot whethßp «eonı^trîo. uıui nıechiüii<^al classifications aocompM^ıed mly by ore prepariatloa nı^tlıocLs, mm at least b© used! a» ai iu^thoto elaoioate the geneşi» ppobl^ns or W% appIîcabLlit>^ must be tovestlgatee

ABSTRACT: The Akdağmadeni lead-zinc deposits are situated) along the ademelUte-regîonally metaınarpha. led rocks contact aad fount! together with sfearn formations. Three different types of ore* are observed: 1) Massive ore, 2) Disseminated ore and S) Cavity ore. The ore miiierals of the deposits and their pare genetic sequnce are as follows i inagnettte-pyrrhoMt©^ pyrtte-afsenopyritë.chalcopyrite-flîiorite-sphalerite-gal© na# In addition^ s^teelito? chalcocite-Covellîte, geottüte and smithsonite are rai^ly observed. Various geothermonieter and geobarometer techniques indicate a formsatton temperature of 80O-480QC and a pressure of ^ 500 bars. These values are compared with the field and petrologlc findings and origin of the mineralizations is discussed.

ABSTRACT: I B the Karadağ regioa an opMolite suit hose lower nwnbers are not complete and are »Med teotonwally thrust over the Upper Oreataoeous voleano-^edtoentary sucoesBlon. These opMolltl«, racks are c^ vered by tower.middle Eocene formation which is andeslte-dacite intercalated and bears coal seam» The utoabasic rocks Wch occur as a thin 8Ude, have catectostic textures, are mylonltized and cupletelv »er^tuuzed. Here, cumulates are not observed. The mm abundant ophloUtio rocks a« the i^troDio gabbw» of ôUnopyrostene-hdrnbleiKl gabbro and micri gabbro and overfain these spiMtto diabases In additioh ptegiag^adte intrusion« what outcrop as small areas in spUittte diabase, are present _ The poiymetaUlc mineralizations are related to the listwanite« (siltoifled and cartonitlsed serpenttnlte mo AÄcattons) whose exposures are scattered along the thrust zone. The totwanites aecomadate about ödrtv ore mtoerab whtoh are either disseminated or fill the veins and veinlets together with dolomite and silica CM the « ore «rinçais chromite fa a relict mineral of the original rock (ha^burgite), ««gnetite and NtataerMs are developed from the elements hlch were present in the structures of cMcate mtaarate of the original rock and became free daring the procces of ltetwanltteatlon, Sinc^ the original nock did not contain W Hk As Sb and Bi these elements are thought to be introduced by hydrothermal solutions, to the light of »eoMeal as`raet* «f the region, it to passible to claim that the mineralog hydrothermal »luttons originated frem the iSwer Middle Eocene dacltic volcanism.

ABSTRACT: Motaess variations and topographic structure of the baükı floor >ùî the PMöcene and; »QM deposits in Ankara and Etîmesgut-Batakeııt basins have bmm oemimned on an ïsopaeh map ancï m structure- contour map, According to these studies and the field observations, presence of a püeoridge which extended in NB-SW dla*ection between Ankara and Efenesgut-Bafakent basms during PUocene, and that consiste of Jurassic aged İtaestanıeg and Miocene aged volcaniitea has b&m recognized, E1n,allyf deposlMon prooes-» ses of the sol deposits have been discussed to tMs study

ABSTRACT: Magnetic a»d environ-mental properties of the day mineral» ape vartaMe, The major diage nette phase diagrams of the argillaceous sediments and sedimentary rock faciles ûave been established by thi chemical dates of the natural phylloâlHcates, The presence erf glauciOTiite is a usefiil criteria for the mariai and shalow imarine sedîm^ts and is not affected much fey the burial diiagenesas. Chlorite» are f&mmû b} weathering of the primary micas .They replaces ilites and otheiF ûlagenesis, speeîfloaliy at the beglimlnf of metamorphtem, Smectttes are exposed to Important mtaeralogica thages which extend from the beginning of sedimentation to late stage of diagenesis. The iDceurenoe of chio rites In the sedimentary rocks M controlled by the other phases rather than their thermal stabMJty; the: Câisappêar at toe late stage of metamorph&m. lllltes form through a series of chemical reactions unde P « T conditions.